428250725 has 12 divisors (see below), whose sum is σ = 606892704. Its totient is φ = 293657520.

The previous prime is 428250721. The next prime is 428250727. The reversal of 428250725 is 527052824.

It is not a de Polignac number, because 428250725 - 2² = 428250721 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428250721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1223399 + ... + 1223748.

It is an arithmetic number, because the mean of its divisors is an integer number (50574392).

Almost surely, 2^428250725 is an apocalyptic number.

It is an amenable number.

428250725 is a deficient number, since it is larger than the sum of its proper divisors (178641979).

428250725 is a wasteful number, since it uses less digits than its factorization.

428250725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2447164 (or 2447159 counting only the distinct ones).

The product of its (nonzero) digits is 44800, while the sum is 35.

The square root of 428250725 is about 20694.2196035511. The cubic root of 428250725 is about 753.7593324826.

The spelling of 428250725 in words is "four hundred twenty-eight million, two hundred fifty thousand, seven hundred twenty-five".